We have that The equilibrium point is at
P=-2.37
From the question we are told that
A baker will supply 18 jumbo cinnamon rolls to a cafe at a price of $3.89 each.
If she is offered $3.51, then she will supply 2 fewer rolls to the cafe.
[tex]p = D(x) = -0.65x + 9.71.[/tex]
Generally
The supply curve equation is
[tex]\frac{Q-18}{P-3.50}=\frac{3.50-2.86}{18-14}\\\\P=6.25Q-109[/tex]
Where
P=p
Therefore
[tex]6.25Q-109= -0.65x + 9.71\\\\P=-2.37[/tex]
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